Yarn winding and twisting machine spindles



Dec. 9, 1958 F. SCRAGG YARN WINDING AND TWISTING MACHINE SPINDLES Filed April 6, 1956 United Sttes Pater Office 2,863,278 Patented Dec. 9, 1958 YARN WINDING AND TWISTING MACHINE SPINDLES Frederick Scragg, Macclesfield, England, assignor to Ernest Scragg & Sons Limited, Macclesiield, England, a corporation of England Application April 6, 1956, Serial No. 576,614

1 Claim. (Cl. 57-135) This invention relates to improvements in yarn winding and twisting machines of the kindin which the spindles are mounted vertically in bearings in the end of a pivoted arm which is moved about its pivot to move a driving pulley on the spindle into and out of engagement with a driving belt. A yarn package is placed on the spindle which is rotated as the yarn is withdrawn therefrom. If the yarn package is out of balance considerable vibration is set up as the spindle rotates and as the lower end of the spindle rests in a foot step bearing it has been proposed to mount this foot step bearing so that it can float or move against the action of a spring so that the spindle can adjust itself to allow the package to rotate about an axis which passes through the centre of gravity of the package to prevent vibration. Whilst this reduces the vibration set up by an out of balance package it introduces considerable wear on the foot step bearing and causes flexing of the blade or lower end of the spindle which also causes a certain amount of vibration. The object of the present invention is to provide a simple mounting for the bearings of the spindle which will permit of it adjusting itself to permit of an out of balance package running free of vibration, which reduces the wear to the minimum and permits of the spindle being run at a higher speed.

According to this invention the lower end of the spindle is carried by bearings mounted in a cup on the outer end of an arm pivoted at its other end to the machine frame, the bearings comprising a foot step bearing in which the lower end of the spindle rests and a roller bearing in the upper end of a resilient sleeve secured at its lower end to the cup. The upper end of the foot step bearing may be formed with a flange which rests on a seat formed in the cup and the lower end of the resilient sleeve is provided with a flange which rests on the flange on the foot step bearing and the two flanges are secured in position by a screw threaded sleeve which screws into the cup and down on to the flange on the resilient sleeve. Alternatively the foot hearing may be located in the bottom of the resilient sleeve and the flange on the latter located between two resilient washers which are held down by the screw threaded sleeve, or held up to a flange by a cap screwed into the bottom of the cup.

The invention will now be more particularly described with reference to the accompanying drawings, in which:

Fig. l is a sectional elevation and Fig. 2 a plan of a spindle mounted according to this invention.

Fig. 3 is a sectional elevation showing a modified form of mounting.

Fig. 4 is a sectional elevation and Fig. 5 a sectional plan of a further modified form of mounting for the spindle.

Like numerals indicate like parts throughout the drawings.

In one method of carrying out this invention as shown in Figs. 1 and 2 the arm which carries the spindle 11 is pivoted at one end in the usualmanner to a bracket 12 secured to the machine frame 13. The free end of the arm 10 carries a cup or sleeve 14 which is closed atits lower end. Disposed a short distance from the bottom of the cup is an annular seat 15 to carry a foot step bearing 16 for the lower end of the spindle blade 17. For this purpose the foot. bearing 16 is formedwith a flange 18 on its upper end and the underside of the flange 18 rests on the seat 15. Disposed above the foot step bearing 16 is a resilient. sleeve 19 of suitable length and thickness formed with an enlarged part 20 having a recess therein at its upper end to house a roller or needle bearing 21 for the upper end of the spindle blade 17.

In order to hold the resilient sleeve 19 in position it is formed with a flange 22 at its lower end which rests on the flange 18 on the foot step bearing 16 and the two flanges are secured together by a sleeve 23 which is screw threaded on its periphery and engages in a screw threaded part 24 on the inside of the cup or sleeve 14 above the seat 15 and screws down on to the flange 22.

The resilient sleeve 19 is provided with oil holes therein so that oil placed in the cup can pass into the interior of the resilient sleeve to lubricate the spindle bearings. It will be seen that the resilient sleeve is secured in position in the cup by its lower end so that the'resilience of the sleeve allows the upper bearing of the spindle blade to move laterally of the normal axis of the sleeve so that an out of balance package can rotate about an axis which passes through its centre of gravity, this result being automatically attained when the spindle reaches a certain speed of revolution.

The upper end of the retaining sleeve 23 is provided with a felt or rubber washer 25 which fits round the resilient sleeve 19 and whilst allowing the resilient sleeve to move it helps to damp out any vibration due to an out of balance package on ihe spindle and furthermore prevents excessive movement of the resilient sleeve from an out of balance package as the spindle is started up from the rest and until the spindle reaches the speed at which it automatically assumes its running position.

The sleeve 19 is made of plastic material having a certain amount of resiliency and nylon is a suitable material for the purpose. The foot step bearing 16 may also conveniently be made of the same substance which has both wear resisting and anti-frictional properties.

In the preferred method of carrying out this invention shown in Fig. 3 the pivoted arm 10 which carries the spindle 11 is formed with a cup 28 which is closed at its lower end and provided with a seat 29 at the bottom of the cup to receive a damping bush 30 which may conveniently be made of rubber and fits into the lower end of the cup. The spindle bearings comprise a foot step bearing 31 at the lower end of a sleeve 32 and a roller or needle bearing 33 at the upper end of the sleeve 32. The sleeve 32 may be made of steel and the lower end of the sleeve is located in the cup 28 on the pivoted arm 10. In order to hold the bearing sleeve 32 in position it is formed with an outwardly extending flange 34 at its lower end which rests on the damping bush 30 in the bottom of the cup 28. Disposed on the upper side of the flange 34 is a second damping bush 35 which fits into the inside of the cup 28 and may also be made of rubber. This second damping bush 35 is held down on to the flange 34 on the bearing sleeve 32 by the lower end of a retaining sleeve 36 which is concentric with the bearing sleeve 32 and screws into the cup 28 so that the bearing sleeve 32 is resiliently held in position in the cup 28 suflicient clearance being left between the two sleeves to allow for any movement of the bearing sleeve.

The bearing sleeve 32 is provided with oil holes therein so that oil placed in the cup 28 can pass into the until the spindle reaches the speed at which it automatically assumes its running position.

In the method of carrying out this invention as shown in Figs. 4 and 5, the lower end of the spindle blade 17 is disposed in a bearing 40 in the lower end of a sleeve 41 and is held centrally of the sleeve 41 by a roller or needle bearing 42 disposed at the upper end of the sleeve 41. A flange 43 is provided on the exterior of the sleeve 41 at the lower end thereof. The flange 43 is clamped between two resilient washers 44, 45 disposed at the bottom of a cup 46 on the end of the pivoted arm 10. The uppermost washer 45 engages with the underside of a flange 47 on the inside of the cup 46 and is held in engagement therewith by a member 48 which engages with the lowermost washer 44 and screws into the lower end of the cup 46. I

The movement of the sleeve 41 due to an out of balance package on the spindle 11 is damped by a damping member 49 disposed between the sleeve 41 and the upper end of the cup 46. The damping member 49 comprises a diaphragm of oil resisting rubber disposed between the sleeve 41 and cup 46. The diaphragm is provided with outer and inner metal rings 50, 51 to which the rubber is secured by chemical bonding or other means. The outer metal ring 50 is secured to the cup 46 and the inner ring grips the sleeve 41. It will be seen thatthe diaphragm exerts a damping action on the sleeve 41 and the minimum damping action is provided when the inner and outer ring are disposed in the same plane as shown in Fig. 4. By moving the inner ring 51 longitudinally of the sleeve 41 tension will be applied to the diaphragm and its damping action increased, the increase in the damping action depending on the distance the inner ring 51 is moved longitudinally of the sleeve.

The spindle 11 is provided with the usual driving pulley 52 thereon and is moved into and out of engagement with the driving belt 53 in well known mannerto put it into and out of operation.

With the bearings of a spindle blade mounted as described the vibration from an out of balance package is reduced to such an extent as to be almost imperceptible at normal spindle speeds and permits of the spindle being run at a higher speed than has hitherto been possible.

with an out of balance package thereon, with a reduction in the wear on the foot step hearing so that the oil in the cup remains free from swarth.

What I claim is:

A mounting for a belt driven spindle comprising a pivoted arm, a cup on the outer end thereof, a sleeve in the cup, a foot step bearing at the lower end of the sleeve and an antifriction bearing at the upper end of the sleeve to carry the spindle, a flange on the lower end of the sleeve, resilient washers above and below the flange,

said cup having a portion providing a seat for the lower washer, a retaining sleeve to screw into the cup and down on the uppermost resilient washer, and a damping washer between the two sleeves.

References Cited in the file of this patent UNITED STATES PATENTS 2,674,477 Varga et al. Apr. 6, 1954 2,699,033 Bell Jan. 11, 1955 2,704,946 Gray et al. Mar. 27, 1955 2,724,945 McGhee Nov. 29, 1955 

